G_pd3dDevice->CreateOffscreenPlainSurface(ScreenWidth, ScreenHeight,ĭ3DFMT_A8R8G8B8, D3DPOOL_SCRATCH, &pSurface, NULL) g_pd3dDevice is an IDirect3DDevice9 object, and has been assumed to be properly initialized Thus, the code to capture the screen looks as follows: extern IDirect3DDevice9* g_pd3dDevice Once the screen is captured onto the surface, you can use the function D3DXSaveSurfaceToFile() to save the surface directly to the disk in bitmap format. The IDirect3DSurfce9 object can be generated by using the method IDirect3DDevice8::CreateOffscreenPlainSurface(). The interface IDirect3DDevice9 provides the GetFrontBufferData() method that takes a IDirect3DSurface9 object pointer and copies the contents of the front buffer onto that surface. By accessing the front buffer from your application, you can capture the contents of the screen at that moment.Īccessing the front buffer from your application is pretty easy and straightforward. This one, the front buffer, holds the video memory related to the desktop contents, and so essentially is the screen image. And there is another buffer that every application can access by default - the front buffer. ![]() Some applications might have more than one back buffer. This is called the back buffer of the application. Every DirectX application contains a buffer, or a surface to hold the contents of the video memory related to that application. Probably the fastest way to do this is to use DirectX. Note : if this question is not related to stack-overflow or it's off-topic please tell me which stack category I can ask my question ? Return ms.ToArray() // Avarage Time : 3.032 msĪnybody knows which technology and method windows uses to process a screenshot to task bar live thumbnails ? I'm guessing the delay is because of bitmap processing or something but I don't know yet! Here's the way I process picture on server : private static byte capture()īitmap bmp = screenshot_DDAPI() // Avarage Time : 29.6566msīmp.Save(ms, ImageFormat.Jpeg) // Avarage Time : 1.7101 ms Note : This program is not processing over internet it's gonna work on local network. I tried to resize 1920 x 1080 from all methods to Task Bar Preview size but it didn't made any change ! I thought the progress is normal at this way till I checked out Windows 10/8 Task Bar Live Preview Thumbnails and It's fully-real time with out 1ms delay that means frame to frame ! I used C# Windows DirectXCapture with jpg encoder and delay was 16ms for 1920x1080.I used C++ Windows Desktop Duplication API with jpg encoder and delay was 9ms for 1920x1080.I used C# Windows Desktop Duplication API with jpg encoder and delay was 12ms for 1920x1080.I used C# Windows Desktop Duplication API and delay was 19ms for 1920x1080.I used Unit圓D screenCapture with jpg encoder and delay was 38ms for 1920x1080.I used C# copyfromscreen with jpg encoder and delay was 36ms for 1920x1080.I used C# copyfromscreen and the delay was 92ms for 1920x1080.I know the ways already is on internet but the problem is the delay. Okay, What I'm looking for and asking for is a way to capture windows screen at real time in fastest shape. To set your own Game bar screenshot keyboard shortcut, to Settings > Gaming > Game bar.I'm gonna create a very fast and real-time remote service with C# or C++, doesn't matter, but currently I'm using c#. From here, you can click the screenshot button in the Game bar or use the default keyboard shortcut Windows key + Alt + PrtScn to snap a full-screen screenshot. Once enabled, hit the Windows key + G key to call up the Game bar. First, you'll need to enable the Game bar from the settings page by making sure you've toggled on Record game clips, screenshots and broadcasts using Game bar. You can use the Game bar to snap a screenshot, whether you're in the middle of playing a game or not. It will then be saved to the Pictures > Screenshots folder. You can press Fn + Windows logo key + Space Bar to take a screenshot. If your computer doesn't have the PrtScn key, no worries, Microsoft has another keyboard shortcut for you. You'll need to open the shot in an image editor to save it. This will snap your currently active window and copy the screenshot to the clipboard. ![]() ![]() To take a quick screenshot of the active window, use the keyboard shortcut Alt + PrtScn. Your screen will briefly go dim to indicate you've just taken a screenshot, and the screenshot will be saved to the Pictures > Screenshots folder. To capture your entire screen and automatically save the screenshot, tap the Windows key + Print Screen key. Screenshot by Matt Elliott/CNET Windows key + Print Screen You can adjust print screen settings in Windows.
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